External counterpulsation apparatus



FIG. 1 is a front view of an external counterpulsation apparatus, showing my new design;

FIG. 2 is a side view thereof;

FIG. 3 is a rear view thereof; and,

FIG. 4 is a top plan view thereof.

The broken line showing in FIGS. 1, 3 and 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an external counterpulsation apparatus, as shown and described. 